Several analytical parameters were evaluated to investigate changes in the composition of a cold-pressed hemp seed oil over a period of 3 months of storage. The environmental conditions applied for the conservation were 12 h of light and 12 of darkness at room temperature, to mime a grocery or supermarket shelf, and the oil was stored in amber glass bottles. The peroxide value was quite low on freshly produced oil (2.66 ± 0.29 mEqO2/kg of oil) and decreased after 3 months (1.35 ± 0.08 mEqO2/kg of oil), as confirmed by free radical concentration, while no other statistically significant (one-way ANOVA, Tukey’s HSD test, p < 0.05) differences were observed (e.g. conjugated diene and triene systems, Oxidative Stability Index and free acidity). The fatty acid, cannabinoids and tocopherols composition did not statistically change; expect for δ-tocopherol, for which a decrease was observed. The overall results did not show a strong effect of photooxidation on the oil, despite its high degree of unsaturation.
Changes in the composition of a cold-pressed hemp seed oil during three months of storage / Tura, Matilde; Mandrioli, Mara; Valli, Enrico; Rubino, Rosamaria Cristina; Parentela, Dylan; Toschi, Tullia Gallina. - In: JOURNAL OF FOOD COMPOSITION AND ANALYSIS. - ISSN 0889-1575. - ELETTRONICO. - 106:(2022), pp. 104270.1-104270.7. [10.1016/j.jfca.2021.104270]
Changes in the composition of a cold-pressed hemp seed oil during three months of storage
Tura, MatildePrimo
;Mandrioli, Mara;Valli, Enrico
;Toschi, Tullia GallinaUltimo
2022
Abstract
Several analytical parameters were evaluated to investigate changes in the composition of a cold-pressed hemp seed oil over a period of 3 months of storage. The environmental conditions applied for the conservation were 12 h of light and 12 of darkness at room temperature, to mime a grocery or supermarket shelf, and the oil was stored in amber glass bottles. The peroxide value was quite low on freshly produced oil (2.66 ± 0.29 mEqO2/kg of oil) and decreased after 3 months (1.35 ± 0.08 mEqO2/kg of oil), as confirmed by free radical concentration, while no other statistically significant (one-way ANOVA, Tukey’s HSD test, p < 0.05) differences were observed (e.g. conjugated diene and triene systems, Oxidative Stability Index and free acidity). The fatty acid, cannabinoids and tocopherols composition did not statistically change; expect for δ-tocopherol, for which a decrease was observed. The overall results did not show a strong effect of photooxidation on the oil, despite its high degree of unsaturation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
